Container for viscous liquids



1940 w. H. STOKES EIAL 0,830

CONTAINER FOR VISCOUS LIQUIDS Filed Dec'. 8, 1937 3 INVENTORS WILLIAM HENRY STOKES AQWHEN RY EINEM HICK ON by ikez'r al/arneys Patented Nov. 5,1940

V ooNTAmEnron VIShQUSrLIQUIDS- William Henry Stokes, All'esleyr near; Cdventry; 7

Eng-land; and:Henry Ein'em Hickson, Holywell, f q

Wales; assignors tofiourtaulds Limited, London, I England,=arBritish company;

Application-December s, 1937,"Serial.No: 178,826 mor ue-1 min Decemberfll', 193s" 5.Clai=ms.- (01. 259-).:

This invention relates-to" an improvedcon'struc tion of container, adapted'to receive and deliver viscous liquids. It is particularly concerned with large containers such as are used -in the artificial silk industry, for receiving and deliveringliquids suchas viscose.

Inthe extrusion, for example," of viscose to pro duce artificial filaments, viscose is supplied to the nozzles from large tanks or containers. A tank may either be refilled with fresh viscose after the whole of its contents has beendelivered to the nozzles, or it may becontinuousl-y-supplied with fresh viscose while delivery is' taking place. Sincethe age of the viscosehas a marked effect on the properties ofth'e filamentary prodnot obtained" therefrom, itisvery desirable to en'- sure that batches of viscose ofdifierent agesyare not irregularlyj mixed together. We have-found when using the first of'the aforementioned methods of refilling a tank-and delivery therefrom, that there is a tendency; for-the-fresh viscose to stream from the supply tube intothetank-in such a manner that on emptying-the tank, the order of removal of the Viscose is'di-fferent from'th'e order of entry. In other words, batches of viscose of different ages are irregularly mixed together:-

For this reason, the production of absolutely uniform threads is not possible. Similarly, we have found when using the secondof the methods mentioned above, that fresh viscosetends to stream from the supplytube directly t'othe delivery tube leaving older viscose adhering to and in the vicinity of the sides and corners-of"the tank. In thiscase also the-obtainingof-uniform products has been rendered more-difiicult by the consequent irregular mixing together of viscose batches of difierent ages; a

The object of the present invention is to avoid the above mentioned difliculties by ensuring that the viscose or other liquid streams into the tank in proper order, and on emptying, flows away in v the same order as it entered.

We have now found that this object can be attained by using a tank or container within which suitably shaped bodies are placed, one adjacent to the mouth of the supply tube, in the path of the liquid entering, and one adjacent to the delivery tube in the path of the liquid leaving the tank.

The type of container with which the invention is particularly concerned, comprises avertical cylindrical tank, preferably having conical or the like shaped ends, with supply and delivery tubes entering and leaving the tank at the centres of the upper and lower ends respectively.

The-irrventi'on however, is not -limitledto 'tanks of this 1 shape. Thewallsv of: the tank may be other than cylindrical, for example, hexagonal. or

octagonal While. the ends may be, 'for' example,

flat; Thetcp'end may evenjbe left'ope-n;

With a; cylindricaltank with conical or the like shaped ends twobfthe aforesaid bodies maybe used each havingthe shape :of two'cones or conei like bodies'plac'edandunited bas'eto base. The diameters ofthe bases'are equal to one-another, but somewhat less, than'that of the tank; The contour ofith'e lower coneof thelower body'cor- The-upper'cone of the lower body and the lower cone of the upper bodyproject upwardlyjand downwardly respectively into the-tank. Their dimensions are such as;to prevent the formation o'f:*areas where liquid canstagnate untouched by the flow-of the mainbody ofliquid.

While itisessential} according to, the invenresponds: approximately, toithat of the lower. end

tiara-that the contours of the'lo'vverbodyshould in-the part adjacent to tlie 'lower end of the tank follow' clos'elythe contoursof the said end, the

upper part of the-upper body ispreferably conical, dome' -shapedor the-like and does not necessarily correspond to the shape of the; top end of the tank. It is placed "with its apex or top-most point immediately below the liquid entry tube so as to spread the liquid evenly round the periphery of the tank. The bodies should in general not be much smallerin width than the tank. For' example, when using cone-shaped bodies in a cylindrical tank for storing viscose the diameters of the bodies should not be less than half that of the interior of the tank. .They may be solid or hollow, and may be made of any material which is not acted upon by the liquid to be used in the containers.

If the liquid is viscose, they may be made, for example, of a resistant metal. The upper and lower bodies may be connected if desired by means of rods or other suitable means. They are held in position inside the tank, by means, for example, of brackets attached to the walls or ends of the tank.

The accompanying diagrammatic drawing illustrates a tank or container according to the invention in which the cylindrical tank I is provided with a supply tube 2 and an exit tube 3 at the centres of its upper and lower ends respectively. The lower end 5 is conical in shape and the upper end 6 slopes up to a non-central ventpipe 4 through which any gases given ofi from the liquid may be withdrawn. Thebodies I and 8, rigidly connected by a rod or tube 9 are placed inside the tank. The lower cone-shaped body 8 fits into the conical end 5 of the tank and is spaced apart therefrom by lugs I!) which also assist in holding the inserted bodies firmly in position.

Liquid enters through the supply tube 2, flows down between the upper cone of the body 1, and the tank walls, and leaves through the exit tube 3 via the annular space between the body 8 and the tank end 5. A streamline efiect is created by the elimination of corners where stagnation could occur, and the liquid is caused to leave the tank in substantially the same order as it enters.

What we claim is:

delivering it in approximately the same order as it is received, which comprises a tank of uni form interior cross sectional shape with a lower end sloping in all parts to an exit pipe and two fixed bodies inside but spaced apart from the tank, one at the upper end of the tank in 'the path of the entering liquid of cross sectional shape at its widest part similar to but smaller than that of the tank interior, and the other at the lower end of the tank adjacent the liquid exit, both the upper and lower parts of each body being tapered inwardly away from the tank in terior in a streamline effect of similar but decreasing cross sectional shape and the lower part of the lower body being of similar shape to the lower end of the tank.

2. Apparatus for receiving a viscous liquid and delivering it in approximately the same order as it is received, which comprises a vertical cylindrical tank having a conical lower end with a supply tube at the centre of the upper end and a delivery tube at the centre of the lower end, and two fixed bodies inside but spaced apart from the tank, one in the path of the entering liquid of cross sectional shape at its widest part similar to but smaller than that of the tank interior and the other at the lower end of the tank adjacent to the liquid exit, both the upper and lower parts of each body being tapered inwardly away from the tank interior in a streamline effect of similar :but decreasing cross sectional shape and the lower part of the lower body being of similar shape to the lower end of the tank.

1. Apparatus for receiving a viscous liquid and 3. Apparatus for receiving a viscous liquid and delivering it in approximately the same order as it is received, which comprises a tank of uniform interior cross sectional shape with an upper end having a liquid supply tube therein and with a lower end sloping in all parts to an exit pipe and two fixed rigidly connected bodies each comprising two cone-like portions united base to base, the said bases being equal to each other but less than the tank in diameter, inserted in the said tank in such a position that the lower cone like portion of the lower body fits into but is spaced apart from the lower end of the tank and the apex of the upper portion of the upper body is immediately beneath the liquid supply tube in the upper end of the tank.

4. Apparatus for receiving a viscous liquid and delivering it in approximately the same order as it is received, which comprises a vertical cylindrical tank having a conical lower end with a supply tube at the center of the upper end and a delivery tube at the center of the lower end and two fixed rigidly connected bodies each comprising two con-like portions united base to base, the saidbases being equal to each other but less than the tank in diameter, inserted in the said tank in such a position that the lower cone-like portion of one body fits into but is spaced apart from the lower end of the tank and the apex of the upper cone-like portion of the other body is immediately beneath the liquid supply tube in theupper end of the tank.

5. Apparatus for receiving a viscous liquid and delivering it in approximately the same order as it is received, comprising a tank having an upper end provided with an inlet and a lower end provided with an exit and sloping in all parts toward said exit, said tank being of constant cross sectional shape between said ends, in combination with two fixed bodies inside but spaced apart from said tank, one near said upper end in the path of the entering liquid of cross sectional shape at its widest part similar to but smaller than that of the tank interior, thereby defining with the tank interior a throat surrounding said bodyand of uniform width, and the other at the lower end of the tank adjacent the liquid exit similarly forming a lower throat surrounding the same, the lower part of the upper body and the upper part of the-lower body tapering inward away from said tank and from each throat toward the other, thereby forming a liquid space surrounding said bodies and extending between said throats but of materially greater cross sectional area therebetween.

WILLIAM HENRY STOKES. HENRY EINEM HICKSON. 

